Counterbalance-hoist with adjustable counterweight.



W. VAN WIE.

GOUNTERBALANGE HOIST WITH ADJUSTABLE GOUNTERWEIGHT.

APPLICATION FILED JAN.27,1908.

Patented Jan. 19, 1909.

wuamfoz 13 i In use:

WALTER VAN WIE, OF EAST OAKLAND, CALIFORNIA.

GOUN'IERB ALANCE-HOIST WITH ADJUSTABLE COUNTERWEIGHT.

' Specification of Letters Patent.

Patented Jan. 19, 1909.

Application filed January 27, 1908. Serial No. 412,878.

To all whom it may concern:

Be it known that I, W ALTER VAN 112, a citizen of the United States,residing in East Oakland, in the county of Alameda and State ofCalifornia, have invented a new and useful Improvement in CounterbalanceHoists with Adjustable Counterweights, of which the following is aspecification.

This invention relates to a hoisting device and the object of theinvention is a device of the kind provided with a shiftingcounterbalance together with means for sliding the said weight along alever.

The invention consists of the novel features of construction hereinafterdescribed, pointed out in the claims and shown in the accompanyingdrawings in which Figure l is a side elevation of the device. Fig. 2 isa similar view showing the parts in a different position. Fig. 3 is atransverse section taken through the lever and showing in section atraveling carriage supporting the counter-weight.

In these drawings 1 represents a depending cable which supports one endof a lever or vertically swinging beam 2. To the ad jacent end portionof the beam is connected a cable 3 which runs over pulleys at and 5 andsupports the work which is to be lifted to a table, bench, or machinebed. It will be obvious that the weight of the work will tend to elevatethe end of the beam 2 to which the cable 3 is secured. This end can besupported at any desired height by a cable 7 which is engaged by a hook8 carried also by the vertically swinging end portion of the beam. Thishook is in the form of a turn-buckle to allow for more carefuladjustment of the beam. The beam 2 is provided with a plurality oftransverse openings 2 and upon its upper face it is provided with aplurality of recesses 2". A traveling carriage 9 is U-shaped in form andournaled in the bow portion of said carriage is a shaft 10 having ahandle 11 and carr ing a roller 12 having projecting knobs 13 which fitinto the recesses 2 The side members of the carriage 9 fit over thesides of the beam 2 and extend below the same. A weight 14 is supportedby this carriage and a locking pin 15 passes through the side members ofthe carriage and through the perforations 2 and lock the weight 14against sliding movement. along the beam.

It will be obvious that by withdrawing the pin 15 and turning the handle11 the carriage 9 will be moved along the beam toward or away from itsfulcrum point according to the direction of rotation of the handle, thiscausing the weight 14 to balance or overbalance the work, or to causethe work to overbalance the weight 1 1, as may be at the time required.When the parts are in the position shown in Fig. 1 the work can be swungto the bench, table or other support and the hook 3 detached. l/Vhenfinished it can be lowered to the floor, the hook 8 engaged with theupper end of the cable 7 and the hook 5 detached.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent is 1. A device of the kind describedcomprising a vertically swinging beam, said beam having a plurality oftransverse openings and a plurality of recesses upon its upper face, acarriage, a roller carried by the carriage said roller having knobsengaging the recesses of the beam, a locking pin adapted to pass throughthe carriage and the openings of the beam, a weight supported by thecarriage, pulleys, and a cable running over said pulleys and secured atone end to the beam.

9.. A device of the kind described comprising a beam, a cable supportingone end of the beam at a fixed height, a cable connected to the oppositeend portion of the beam said cable running over pulleys, a hook fixed tothe free end of said cable, a carriage traveling along the beam, meansfor locking the carriage to the beam, a weight supported by thecarriage, and means for supporting the free end portion of the beam atits adjusted height.

3. A device of the kind described comprising a pivotally suspended beamhaving recesses upon its upper face, a U-shaped carriage the sidemembers of which overlap the sides of the beam, a shaft journaled in thebow portion of said carriage, a roller on the shaft traveling upon thebeam, knobs upon the roller engaging the recesses of the beam, a handleon the shaft, and a weight supported from said carriage.

WVALTER VAN WIE.

Witnesses:

A. C. HAMMELL, E. V. HARTMAN.

